海砂混凝土-内嵌式阳极粘结性能演化规律

Evaluation of Bond Behavior Between Embedded Anode and Sea Sand Concrete

摘要:

阴极保护是减缓海砂混凝土结构中钢筋腐蚀的有效方法。本章重点研究内嵌式锌合金阳极与钢筋在海砂混凝土中长达360天的粘结性能演化过程。结合实验数据建立腐蚀与摩擦作用下的粘结滑移本构模型。结果表明：内嵌式锌合金阳极以牺牲阳极方式保护钢筋，钢筋粘结强度不退化，腐蚀后的阳极粘结性能退化，粘结强度小幅上升，结合试验得到的粘结滑移关系建立粘结滑移本构模型，提出一种适用于长期使用的内嵌锌合金阳极优化方案。

Abstract:

Cathodic protection is an effective method to slow down the corrosion of reinforcing bars in sea sand concrete structures. This chapter focuses on studying the evolution process of the bond performance between the embedded zinc alloy anode and the reinforcing bars in sea sand concrete for up to 360 days. A bond-slip constitutive model under the action of corrosion and friction is established in combination with the experimental data. The results show that the embedded zinc alloy anode protects the reinforcing bars in a sacrificial anode manner, the bond strength of the reinforcing bars does not deteriorate, the bond performance of the corroded anode deteriorates, and the bond strength increases slightly. A bond-slip constitutive model is established based on the bond-slip relationship obtained from the test, and an optimization scheme for the embedded zinc alloy anode suitable for long-term use is proposed.